1/* Copyright (C) 2002  Free Software Foundation.
2
3   Test strcpy with various combinations of pointer alignments and lengths to
4   make sure any optimizations in the library are correct.  */
5
6#include <string.h>
7
8#ifndef MAX_OFFSET
9#define MAX_OFFSET (sizeof (long long))
10#endif
11
12#ifndef MAX_COPY
13#define MAX_COPY (10 * sizeof (long long))
14#endif
15
16#ifndef MAX_EXTRA
17#define MAX_EXTRA (sizeof (long long))
18#endif
19
20#define MAX_LENGTH (MAX_OFFSET + MAX_COPY + 1 + MAX_EXTRA)
21
22/* Use a sequence length that is not divisible by two, to make it more
23   likely to detect when words are mixed up.  */
24#define SEQUENCE_LENGTH 31
25
26static union {
27  char buf[MAX_LENGTH];
28  long long align_int;
29  long double align_fp;
30} u1, u2;
31
32main ()
33{
34  int off1, off2, len, i;
35  char *p, *q, c;
36
37  for (off1 = 0; off1 < MAX_OFFSET; off1++)
38    for (off2 = 0; off2 < MAX_OFFSET; off2++)
39      for (len = 1; len < MAX_COPY; len++)
40	{
41	  for (i = 0, c = 'A'; i < MAX_LENGTH; i++, c++)
42	    {
43	      u1.buf[i] = 'a';
44	      if (c >= 'A' + SEQUENCE_LENGTH)
45		c = 'A';
46	      u2.buf[i] = c;
47	    }
48	  u2.buf[off2 + len] = '\0';
49
50	  p = strcpy (u1.buf + off1, u2.buf + off2);
51	  if (p != u1.buf + off1)
52	    abort ();
53
54	  q = u1.buf;
55	  for (i = 0; i < off1; i++, q++)
56	    if (*q != 'a')
57	      abort ();
58
59	  for (i = 0, c = 'A' + off2; i < len; i++, q++, c++)
60	    {
61	      if (c >= 'A' + SEQUENCE_LENGTH)
62		c = 'A';
63	      if (*q != c)
64		abort ();
65	    }
66
67	  if (*q++ != '\0')
68	    abort ();
69	  for (i = 0; i < MAX_EXTRA; i++, q++)
70	    if (*q != 'a')
71	      abort ();
72	}
73
74  exit (0);
75}
76